CN210154722U - Wireless measuring device for stress of connecting rod - Google Patents
Wireless measuring device for stress of connecting rod Download PDFInfo
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- CN210154722U CN210154722U CN201921007810.4U CN201921007810U CN210154722U CN 210154722 U CN210154722 U CN 210154722U CN 201921007810 U CN201921007810 U CN 201921007810U CN 210154722 U CN210154722 U CN 210154722U
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Abstract
The utility model relates to the technical field of automobiles, especially, relate to a wireless measuring device of connecting rod stress, it includes signal acquisition emission module, signal reception module, host computer and power module, signal acquisition emission module sets up on the connecting rod for to in the motion the connecting rod carries out after signal acquisition and will handle the signal sends through radio communication, signal reception module sets up outside the engine cylinder body, is used for receiving the signal conveys the signal the host computer, power module sets up on the connecting rod, power module's one end with signal acquisition emission module electricity is connected, and the other end links to each other with the wire that charges. The utility model can dynamically measure the stress of the connecting rod; a wireless data transmission mode is adopted, and a lead is not required to be arranged, so that the measurement structure is simplified; meanwhile, data transmission and charging can be carried out in real time.
Description
Technical Field
The utility model relates to the field of automotive technology, especially, relate to a wireless measuring device of connecting rod stress.
Background
The engine is a power source of an automobile, and a connecting rod in the engine is used for connecting a piston and a crankshaft, so that the reciprocating motion of the piston is converted into the rotating motion of the crankshaft, and the connecting rod is one of the most important components in the engine.
During the operation of the engine, the connecting rod is subjected to the combined action of explosion pressure and reciprocating inertia force during combustion. These forces, which vary in magnitude and direction periodically, constitute the alternating load of the connecting rod, and therefore require that the connecting rod must have sufficient fatigue strength and structural rigidity. Insufficient fatigue strength can cause the connecting rod bolt, the big head cover or the rod body to break; insufficient rigidity may cause bending deformation of the rod body and out-of-round deformation of the large end, which all result in significant damage to the engine. Therefore, in the development stage, the actual stress of the connecting rod under different working conditions needs to be measured, and the reliable operation of the engine is ensured.
At present, the stress of the connecting rod is tested in a static mode and a dynamic mode. Static stress is tested by adopting a tension and compression testing machine in a laboratory, but the stress condition of the connecting rod cannot be completely reflected; the dynamic test needs to be carried out in the running process of the engine, the test device has a complex structure, a severe working environment and poor system reliability, but the stress condition of the connecting rod can be truly reflected. The dynamic test mainly comprises three types of signal mechanical leading-out, signal storage and signal wireless transmission.
The signal mechanical leading-out type is characterized in that a special cable leading-out mechanism is designed according to the structure of an engine to be tested, and a lead is connected to data acquisition equipment outside a cylinder body through a multi-link mechanism. Although the principle of the method is simple, the structure is complex, and in the working process, the lead is easy to break, and the reliability is poor.
The signal storage type generally refers to that a strain gauge acquisition circuit, a microcontroller, a storage unit and a power supply are integrated and installed in an engine cylinder to independently work. During testing, the system collects and stores a connecting rod stress signal; after the test is completed, the device is taken out of the engine and the stored stress test data is read. The system cannot monitor signals in real time, and the working time is also limited by the battery capacity.
Therefore, a wireless link stress measuring device is needed to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a wireless measuring device for the stress of a connecting rod, which can dynamically measure the stress of the connecting rod; a wireless data transmission mode is adopted, and a lead is not required to be arranged, so that the measurement structure is simplified; meanwhile, data transmission and charging can be carried out in real time.
To achieve the purpose, the utility model adopts the following technical proposal:
a wireless link stress measuring device, comprising: signal acquisition emission module, signal reception module, host computer and power module, signal acquisition emission module sets up on the connecting rod, is used for in to the motion the connecting rod carries out signal acquisition and will handle the back the signal sends through wireless communication, signal reception module sets up outside the engine jar body, is used for receiving the signal conveys the signal the host computer, power module sets up on the connecting rod, power module's one end with signal acquisition emission module electricity is connected, and the other end links to each other with the wire that charges.
Preferably, the signal acquisition and emission module comprises a signal acquisition module, a microprocessor and a wireless emission module, the signal acquisition module is arranged on the connecting rod, an input port of the microprocessor is connected with the signal acquisition module and used for converting the signals acquired by the signal acquisition module into digital signals, and the wireless emission module is connected with an output port of the microprocessor and used for outputting the digital signals outwards.
Preferably, the signal acquisition module is composed of 4 strain gauges with the same specification, the 4 strain gauges form a wheatstone bridge, two adjacent strain gauges form a group, and the two groups of strain gauges are arranged on two opposite sides of the middle position of the connecting rod.
Preferably, the included angle between two adjacent strain gauges is 90 degrees.
Preferably, the microprocessor is an analog-to-digital converter.
Preferably, the wireless communication between the signal acquisition and transmission module and the signal receiving module adopts an IEEE802.11b/g/n wireless protocol.
Preferably, the signal receiving module is connected with the upper computer through a data line.
Preferably, the power module includes a rechargeable battery and a wireless charging module, the rechargeable battery is disposed at the large end of the connecting rod, one end of the rechargeable battery is connected to the wireless charging module, and the other end of the wireless charging module is connected to the charging wire.
Preferably, the wireless charging module comprises a receiving module and a transmitting module, the receiving module is connected with the rechargeable battery, and the transmitting module is connected with the charging wire.
Preferably, the rechargeable battery is a lithium battery.
The utility model has the advantages that:
the utility model provides a wireless measuring device of connecting rod stress carries out wireless communication through adopting signal acquisition emission module and signal receiving module, avoids using the lead wire, has simplified measurement structure, and simultaneously, signal receiving module sets up outside the engine cylinder body, and signal acquisition emission module and signal receiving module can carry out signal transmission in real time and handle the host computer with signal transmission, and power module links to each other with the wire that charges, can charge in real time, guarantees that the measurement process lasts and goes on.
Drawings
Fig. 1 is a schematic view of a wireless measuring device for connecting rod stress according to the present invention;
fig. 2 is a schematic diagram of a signal acquisition and transmission module in a wireless measuring device for connecting rod stress according to the present invention;
fig. 3 is a schematic diagram of a power module in the wireless measuring device for connecting rod stress according to the present invention.
In the figure:
1-a connecting rod; 2-a signal acquisition and transmission module; 21-a signal acquisition module; 22-a microprocessor; 23-a wireless transmission module; 3-a signal receiving module; 4-a power supply module; 41-rechargeable battery; 42-a receiving module; 43-a transmitting module; 5-an upper computer; 6-charging wire; 7-a data line; 8-engine cylinder block.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The connecting rod is used for connecting piston and bent axle, change the reciprocating motion of piston into the rotary motion of bent axle, in order to carry out effective measurement to the stress of this part, simplify and measure the structure, as shown in fig. 1, the utility model provides a connecting rod stress wireless measuring device, including signal acquisition emission module 2, signal reception module 3, host computer 5 and power module 4, signal acquisition emission module 2 sets up on connecting rod 1, be used for carrying out signal acquisition and sending the signal after handling through wireless communication to connecting rod 1 in the motion, signal reception module 3 sets up outside engine cylinder body 8, be used for received signal and with signal transmission host computer 5, power module 4 sets up on connecting rod 1, power module 4's one end is connected with signal acquisition emission module 2 electricity, the other end links to each other with charging wire 6.
Further, as shown in fig. 2, the signal acquisition and transmission module 2 includes a signal acquisition module 21, a microprocessor 22 and a wireless transmission module 23, the signal acquisition module 21 is disposed on the connecting rod 1, an input port of the microprocessor 22 is connected to the signal acquisition module 21 for converting the signal acquired by the signal acquisition module 21 into a digital signal, specifically, the microprocessor 22 is an analog-to-digital converter (ADC), and the microprocessor 22 converts the analog signal into a digital signal to facilitate transmission and processing of the signal. The wireless transmitting module 23 is connected with an output port of the microprocessor 22 and is used for outputting the digital signal to the outside. In the embodiment, the model of the signal acquisition module 21 is KYOWA KFG-5-120-D16-11; the model of the microprocessor 22 is Analog ADUC848BSZ 8; the wireless transmission module 23 is model number ESP-8266, and in other embodiments, these electrical components may be other electrical components that can also achieve these functions, and are not limited herein.
The signal receiving module 3 receives the signal transmitted by the wireless transmitting module 23 in real time and transmits the signal to the upper computer 5, specifically, the signal receiving module 3 is connected with the upper computer 5 through the data line 7, and the signal is ensured to be effectively received by the upper computer 5 through the data line 7. By adopting the signal acquisition and transmission module 2 to carry out wireless communication with the signal receiving module 3, the use of a lead wire is avoided, and the measurement structure is simplified. Optionally, the signal receiving module 3 has a model number of Intel9260 AC. In order to ensure the real-time property of signal transmission and further ensure that the stress of the connecting rod 1 can be detected in real time, the wireless communication between the signal acquisition and transmission module 2 and the signal receiving module 3 adopts an IEEE802.11b/g/n wireless protocol, the speed of the wireless communication can reach 540Mbit/s, and the wireless communication can be used for strain signal transmission with high sampling rate. And IEEE802.11b/g/n wireless protocol has guaranteed that signal transmission distance is superior to protocols such as bluetooth, zigBee, and signal reception module 3 sets up in the outside of engine cylinder body 8, adopts data line 7 of sufficient length between signal reception module 3 and the host computer 5, makes host computer 5 can arrange in the place of keeping away from experimental scene to can guarantee operating personnel safety.
Further, the signal acquisition module 21 is composed of 4 strain gauges with the same specification, the 4 strain gauges constitute a wheatstone bridge, two adjacent strain gauges form a group, two groups of strain gauges are arranged on two opposite sides of the middle position of the connecting rod 1, and an included angle between the two adjacent strain gauges in the same group is 90 degrees. The included angle of the two strain gauges in the same group is 90 degrees to form the adjacent edge of the Wheatstone bridge, so that the influence of temperature is offset, and the accuracy of stress measurement is improved.
Further, as shown in fig. 3, the power module 4 includes a rechargeable battery 41 and a wireless charging module, the rechargeable battery 41 is disposed at the large end of the connecting rod 1, one end of the rechargeable battery is connected to the wireless charging module, and the other end of the wireless charging module is connected to the charging wire 6. Specifically, the wireless charging module includes a receiving module 42 and a transmitting module 43, the receiving module 42 is connected with the rechargeable battery 41, and the transmitting module 43 is connected with the charging wire 6. The rechargeable battery 41 is a lithium battery with relatively mature charging technology and stable and fixed performance. The wireless charging module is adopted to charge the rechargeable battery 41 in real time to prevent the power supply from being insufficient in electric quantity so as to influence the stress measurement of the connecting rod 1; meanwhile, the problem of winding of lines in the rotating process of the connecting rod 1 can be effectively solved by adopting the wireless charging module. The wireless charging technology is a conventional technology, and in the present embodiment, the transmitting module 43 is of the type XKT-L32, and the receiving module 42 is of the type PN 7724.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A wireless measurement device for connecting rod stress, comprising: signal acquisition emission module (2), signal reception module (3), host computer (5) and power module (4), signal acquisition emission module (2) sets up on connecting rod (1), is arranged in the motion connecting rod (1) carry out signal acquisition and will handle the back the signal sends through radio communication, signal reception module (3) set up outside engine cylinder body (8), are used for receiving the signal conveys the signal host computer (5), power module (4) set up on connecting rod (1), the one end of power module (4) with signal acquisition emission module (2) electricity is connected, and the other end links to each other with charging wire (6).
2. The connecting rod stress wireless measuring device according to claim 1, wherein the signal acquisition and transmission module (2) comprises a signal acquisition module (21), a microprocessor (22) and a wireless transmission module (23), the signal acquisition module (21) is arranged on the connecting rod (1), an input port of the microprocessor (22) is connected with the signal acquisition module (21) and used for converting the signal acquired by the signal acquisition module (21) into a digital signal, and the wireless transmission module (23) is connected with an output port of the microprocessor (22) and used for outputting the digital signal outwards.
3. The wireless connecting rod stress measuring device according to claim 2, wherein the signal acquisition module (21) is composed of 4 strain gauges with the same specification, 4 strain gauges form a Wheatstone bridge, two adjacent strain gauges form a group, and two groups of strain gauges are arranged on two opposite sides of the middle position of the connecting rod (1).
4. The wireless connecting rod stress measuring device according to claim 3, wherein the included angle between two adjacent strain gauges is 90 degrees.
5. A wireless link stress measuring device according to claim 2, wherein said microprocessor (22) is an analog to digital converter.
6. The device for wireless measurement of the stress of the connecting rod according to claim 1, wherein the wireless communication between the signal acquisition and transmission module (2) and the signal receiving module (3) adopts an IEEE802.11b/g/n wireless protocol.
7. The wireless connecting rod stress measuring device according to claim 1, wherein the signal receiving module (3) is connected with the upper computer (5) through a data line (7).
8. The device for wireless measurement of connecting rod stress as claimed in claim 1, wherein the power module (4) comprises a rechargeable battery (41) and a wireless charging module, the rechargeable battery (41) is disposed at the large end of the connecting rod (1), one end of the rechargeable battery is connected to the wireless charging module, and the other end of the wireless charging module is connected to the charging wire (6).
9. The device for wirelessly measuring the stress of the connecting rod according to claim 8, wherein the wireless charging module comprises a receiving module (42) and a transmitting module (43), the receiving module (42) is connected with the rechargeable battery (41), and the transmitting module (43) is connected with the charging wire (6).
10. The wireless link stress measurement device according to claim 8, wherein the rechargeable battery (41) is a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921007810.4U CN210154722U (en) | 2019-07-01 | 2019-07-01 | Wireless measuring device for stress of connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921007810.4U CN210154722U (en) | 2019-07-01 | 2019-07-01 | Wireless measuring device for stress of connecting rod |
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| Publication Number | Publication Date |
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| CN210154722U true CN210154722U (en) | 2020-03-17 |
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| CN201921007810.4U Active CN210154722U (en) | 2019-07-01 | 2019-07-01 | Wireless measuring device for stress of connecting rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686561A (en) * | 2021-08-20 | 2021-11-23 | 上海交通大学 | Signal synchronous acquisition system for wireless measurement of friction force of piston group |
| CN114759954A (en) * | 2022-06-13 | 2022-07-15 | 西南交通大学 | Wheel-rail force wireless detection device |
-
2019
- 2019-07-01 CN CN201921007810.4U patent/CN210154722U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686561A (en) * | 2021-08-20 | 2021-11-23 | 上海交通大学 | Signal synchronous acquisition system for wireless measurement of friction force of piston group |
| CN114759954A (en) * | 2022-06-13 | 2022-07-15 | 西南交通大学 | Wheel-rail force wireless detection device |
| CN114759954B (en) * | 2022-06-13 | 2022-09-06 | 西南交通大学 | Wheel-rail force wireless detection device |
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